Htjish hardingham



Patented Dec. 27, I898.

No. 6l6.534.

G. G. M. HARDINGHAM.

DRIVING MECHANISM FOR CYCLES. I

(Application filed. may 24, 1897.

3 Shuts-Sheet I.

No Model.)-

V255. 9. mm.

N0. 6|6,534. Patented Dec. 27, I898. G. G. M. HARDINGHAM.

DRIVING MECHANISM FOR CYCLES.

(Applichtion filed May 24, 1897.)

(No Model.) a Sheets-Sheet 2.

MT/VESSES.

No. 616,534. Patented Dec. 27, I898. G. G. M. HARDINGHAM.

DRIVING MECHANISM FOR CYCLES.

(Application filed may 24, 1897.) v

(No Model.) 3 Sheets-Sheet 3 61. WWW

GEORGE G. M, HARDINGHAM, OF LONDON, ENGLAND.

DRIVING MECHANISM FOR CYCLES.

SPECIFICATION forming part of Letters Patent No. 616,534, dated December 27, 1898. Application filed May 24,1897. Serial No. 637,933. No model.)

To (tZZ whom it may concern:

Be it known that I, GEORGE GATTON MEL- HUISH HARDINGHAM, a subject of the Queen of Great Britain and Ireland, residing at 191 Fleet street, London, in the county of Middlesex, England, have invented new and useful Driving Mechanism for Cycles, (in respect whereof I have obtained Letters Patent in Great Britain, dated March 13, 1897, No. 0,683,) of which the following is a specification.

This invention relates to driving mechanism of the type in which a pedal-lever is employed in place of the usual chain-gear to transmit motion from the foot to the propelling-wheel of a cycle.

The application of my invention to a reardriven bicycle is illustrated in the accompanying drawings, whereof- Figure 1 is a side elevation of the complete machine; Fig. 2, a horizontal section through the hub of the driving-wheel, showing the driving mechanism; Fig. 3, a vertical section showing portions of the driving-gear, as also one of the pedal-levers in elevation; and Fig. l, a similar vertical section, certain parts being, however, removed, so as to expose the intermediate wheel-carrier.

A pair of levers A A carry at their forward extremities pedals a a and are connected at their after extremities to crank-pins B B, located on opposite sides of the rear wheel, the said crank-pins being arranged radially opposite to one another and keyed to the shaft O. Each of the pedal-levers A A is suspended from the frame by means of a link D, attached at a point intermediate of its length, the link thus affording the lever a floating fulcrum. It will, however, be obvious that the lever may be mounted in a fixed guide or hearing, the employment of a floating fulcrum being in no way essential. Bet-ween the crank-shaft O and the hub E of the road-wheel is arranged a three-part differential gear, comprising a central pinion F, a surrounding internallytoothed wheel G, and an intermediate toothed wheel H or series of such wheels, the latter meshing with the central pinion F and with the internally-toothed wheel G. The crankshaft 0 is secured by means of the sleeve 9 5o while the speed of rotation is increased in such degree as may be desired by suitably proportioning the diameter of the central pinion F to that of the surrounding toothed wheel G. The studs h are preferably supported at their outer extremities in a ring 7%, which is secured to the disk or carrier h by means of studs 72.5. The chamber Which incloses the gear and forms the hub of the road- Wheel may be partially charged with lubricating fluid, the toothed gear thus running in an oil-bath, the lubricant being introduced or discharged by way of the screw-plugged orifice e.

What I claim as my invention, and desire to secure by Letters Patent, is

The herein-described driving mechanism for rear-driven cycles, comprising a pair of vibrating and reciprocating pedal-levers of the first order, a crank mounted centrally in the road driving-wheel and carrying at its opposite extremities cranks respectively connected direct to the pedal-levers, and, concentric with the crank-shaft, a three-part differential gear whereof the outer Wheel is connected with the shaft, the central pinion with the road-wheel, and the intermediate-wheel carrier with the frame, the intermediate Wheels meshing both with the outer wheels and with the central pinion, substantially as herein described and whereby the motion transmitted to the road-wheel is in the reverse direction to that imparted to the crank-shaft.-

G. G. M. HARDINGHAM.

lVitnesses:

F. J. RAPSON, W. F. CAIN. 

